104 TlIK ^riDDLE DkVOXIAN DEPOSITS OF MARYLAND 



suhiilatuiii Hall (?), Oiihoceras tchiinon Hall (?), Orthoceras ciiiaccra- 

 tum Hall (?), and Spyroceras nuntiuin Hall were found only in West 

 Virginia but on account of the nearness of their occurrence to the Mary- 

 land areas they have been left in the Maryland fauxui. A complete list of 

 occurrences for each species will be found in the part devoted to the syste- 

 matic paleontology. 



The geological range of the species in Maryland is compared with that 

 of New York State, since the latter is the standard for the American 

 Devonian and it is desired to learn with which Kew York formation the 

 fauna of the Maryland Romney is most closely related. Again, where the 

 age of the beds in certain districts of New York is in question the 

 reported occurrence of species in such localities has not been recorded. 

 For example, the species are not listed in these tables which have been 

 reported in the fossiliferous beds immediately succeeding the Oneonta 

 sandstone in the Clunango Valley and to the eastward, because they have 

 been referred to the Chemung by some geologists and to the Ithaca by 

 others. In reference to the Ithaca fauna in eastern central New York 

 it must be remembered that it is composed largely of Hamilton species; 

 but it is to be noted in reference to many of the species that they occur 

 intrequently and not in the abundance^ which characterizes their distri- 

 bution in the Hamilton. 



